Line data    Source code

       1             : /*
       2             :    Unix SMB/Netbios implementation.
       3             :    Version 1.9.
       4             :    VFS module to perform read-only limitation based on a time period
       5             :    Copyright (C) Alexander Bokovoy 2003
       6             : 
       7             :    This program is free software; you can redistribute it and/or modify
       8             :    it under the terms of the GNU General Public License as published by
       9             :    the Free Software Foundation; either version 3 of the License, or
      10             :    (at your option) any later version.
      11             : 
      12             :    This program is distributed in the hope that it will be useful,
      13             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15             :    GNU General Public License for more details.
      16             : 
      17             :    You should have received a copy of the GNU General Public License
      18             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.
      19             : 
      20             :    This work was sponsored by Optifacio Software Services, Inc.
      21             : */
      22             : 
      23             : #include "includes.h"
      24             : #include "smbd/smbd.h"
      25             : #include "getdate.h"
      26             : 
      27             : /*
      28             :   This module performs a read-only limitation for specified share 
      29             :   (or all of them if it is loaded in a [global] section) based on period
      30             :   definition in smb.conf. You can stack this module multiple times under 
      31             :   different names to get multiple limit intervals.
      32             : 
      33             :   The module uses get_date() function from coreutils' date utility to parse
      34             :   specified dates according to date(1) rules. Look into info page for date(1)
      35             :   to understand the syntax.
      36             : 
      37             :   The module accepts one parameter: 
      38             : 
      39             :   readonly: period = "begin date","end date"
      40             : 
      41             :   where "begin date" and "end date" are mandatory and should comply with date(1) 
      42             :   syntax for date strings.
      43             : 
      44             :   Example:
      45             : 
      46             :   readonly: period = "today 14:00","today 15:00"
      47             : 
      48             :   Default:
      49             : 
      50             :   readonly: period = "today 0:0:0","tomorrow 0:0:0"
      51             : 
      52             :   The default covers whole day thus making the share readonly
      53             : 
      54             :  */
      55             : 
      56             : #define MODULE_NAME "readonly"
      57           0 : static int readonly_connect(vfs_handle_struct *handle, 
      58             :                             const char *service, 
      59             :                             const char *user)    
      60             : {
      61           0 :   const char *period_def[] = {"today 0:0:0", "tomorrow 0:0:0"};
      62             : 
      63           0 :   const char **period = lp_parm_string_list(SNUM(handle->conn),
      64           0 :                                              (handle->param ? handle->param : MODULE_NAME),
      65             :                                              "period", period_def); 
      66           0 :   int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
      67             : 
      68           0 :   if (ret < 0) {
      69           0 :     return ret;
      70             :   }
      71             : 
      72           0 :   if (period && period[0] && period[1]) {
      73             :     int i;
      74           0 :     time_t current_time = time(NULL);
      75           0 :     time_t begin_period = get_date(period[0], &current_time);
      76           0 :     time_t end_period   = get_date(period[1], &current_time);
      77             : 
      78           0 :     if ((current_time >= begin_period) && (current_time <= end_period)) {
      79           0 :       connection_struct *conn = handle->conn;
      80             : 
      81           0 :       handle->conn->read_only = True;
      82             : 
      83             :       /* Wipe out the VUID cache. */
      84           0 :       for (i=0; i< VUID_CACHE_SIZE; i++) {
      85           0 :         struct vuid_cache_entry *ent = &conn->vuid_cache->array[i];
      86           0 :         ent->vuid = UID_FIELD_INVALID;
      87           0 :         TALLOC_FREE(ent->session_info);
      88           0 :         ent->read_only = false;
      89           0 :         ent->share_access = 0;
      90             :       }
      91           0 :       conn->vuid_cache->next_entry = 0;
      92             :     }
      93             : 
      94           0 :     return 0;
      95             : 
      96             :   } else {
      97             :     
      98           0 :     return 0;
      99             :     
     100             :   }
     101             : }
     102             : 
     103             : 
     104             : static struct vfs_fn_pointers vfs_readonly_fns = {
     105             :         .connect_fn = readonly_connect
     106             : };
     107             : 
     108             : NTSTATUS vfs_readonly_init(TALLOC_CTX *);
     109          27 : NTSTATUS vfs_readonly_init(TALLOC_CTX *ctx)
     110             : {
     111          27 :   return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, MODULE_NAME,
     112             :                           &vfs_readonly_fns);
     113             : }